Here is the full list of all 45 Ben 10 Ultimate Alien: Cosmic Destruction achievements worth 1,000 gamerscore.
Found all of the hidden Sumo Slammers in the game
Found all of the hidden Sumo Slammers in the Final Battle
Saved all of the civilians in the Final Battle
Found all of the hidden Sumo Slammers in the Colosseum
Fully upgraded all aliens
Got a 100 hit combo
Earned One Million DNA
Destroyed all the security cameras in the Amazon level
Found all of the hidden Sumo Slammers in Tokyo Nights
Found all of the hidden Sumo Slammers in Devils Tower
Found all of the hidden Sumo Slammers in the Eiffel Tower
Defeated the Terracotta General
Completed the Game
Found all of the hidden Sumo Slammers in the Great Wall
Found all of the hidden Sumo Slammers in the Amazon
Unlocked Rath as a playable character
Watched the entire credits
Completed the Ultimate Echo event
Completed the Zombozo Ultimate event
Completed the Devil's Tower level
Completed the Great Wall level
Completed the Tokyo Nights level
Completed the Amazon level
Completed the Colosseum level
Completed the Final Battle level
Defeated 500 enemies
Got a 50 hit combo
Fully upgraded one alien
Destroyed 500 breakable objects
Destroyed all cars within the game
Destroyed 200 breakable objects
Completed the Sunder Ultimate event
Completed the Eiffel Tower level
Defeated 200 enemies
Defeated 50 enemies as Ben Tennyson
Discovered all of the Combat Bonuses
Completed the Catacombs level
Got a 25 hit combo
Found all of the hidden Sumo Slammers in the Catacombs
Spent 10000 on upgrades
Spent 1000 on upgrades
Destroyed 30 breakable objects
Defeated all of Vulkanus’ minions
Defeated 100 enemies
Got a 10 hit combo